/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package sgt.onlinetest.controller.questioncategory;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import sgt.onlinetest.controller.XServlet;
import sgt.onlinetest.entity.QuestionCategory;
import sgt.onlinetest.hibernatedao.HibernateDAOFactory;
import sgt.onlinetest.util.Converter;

/**
 *
 * @author Administrator
 */
public class ListQuestionCategories extends XServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        HibernateDAOFactory factory = new HibernateDAOFactory();
        //select the QuestionCategory to be displayed
        QuestionCategory parent = null;
        if (request.getParameter("id") != null) {
            parent = factory.getQuestionCategoryDAO().getById(Converter.toLong(request.getParameter("id")));
        } else {
            parent = factory.getQuestionCategoryDAO().getRoot();
        }


        if (request.getMethod().equalsIgnoreCase("POST")) {
            //check if user want to remove a QuestionCategory
            if (request.getParameter("remove") != null) {
                long removeId = Converter.toLong(request.getParameter("removeId"));
                QuestionCategory catToRemove = factory.getQuestionCategoryDAO().getById(removeId);
                if (catToRemove != null) {
                    parent.removeChild(catToRemove);
                    factory.getQuestionCategoryDAO().delete(catToRemove);
                    factory.getQuestionCategoryDAO().save(parent);
                }
            } else //check if user want to add a QuestionCategory
            if (request.getParameter("add") != null) {
                QuestionCategory catToAdd = new QuestionCategory(request.getParameter("name"));
                parent.addChild(catToAdd);
                factory.getQuestionCategoryDAO().save(parent);
            } else //check if user want to rename current QuestionCategory
            if (request.getParameter("rename") != null) {
                parent.setName(request.getParameter("name"));
                factory.getQuestionCategoryDAO().save(parent);
            }
        }
        request.setAttribute("parent", parent);
        request.setAttribute("title", "Manage categories");
        request.getRequestDispatcher("/category.list.tiles").forward(request, response);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
